Fatal error: Uncaught Error: Class "Ratchet\AbstractMessageComponentTestCase" not found in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/tests/unit/Wamp/WampServerTest.php:8 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/tests/unit/Wamp/WampServerTest.php on line 8